Stocks/Funds/CIK 1839435

Octagon Capital Advisors LP

Quarterly 13F filings · Latest period 2026-03-31 · CIK 1839435
Assets
$904M
+89.6% YoY
Holdings
29
Lifetime alpha vs market
+3.84% annual
Average hold time
1.3 yr
median 1.0 yr

Quarterly history

Cum return +77% vs S&P +52% · α +25% lifetimeAUM $904M · peak $904MFlow $-20M (-2%)2020-122021-122022-122023-122024-122025-122026-03
AUM ($B)fundS&P 500(gap = α)/ Flow in/out

Behavior signals (lifetime)

Dip response
-6.48%
trims when stocks drop
when a holding falls −10%+
Middle response
-2.76%
baseline attrition
Rally response
-4.95%
trims into rallies
when a holding rises +10%+

Top positions · 29

Ticker$ value% portYoYHold time
DNTHDianthus Therapeutics, I$163M18.1%+362.6%2.8 yr
COGTCogent Biosciences, Inc.$90M10.0%+542.6%1.8 yr
ABVXAbivax S.A.$75M8.3%+1681.6%1.3 yr
ALMSAlumis Inc. Common Stock$62M6.9%+258.8%0.5 yr
DFTXDefinium Therapeutics, I$46M5.1%0.3 yr
AVBPArriVent BioPharma, Inc.$45M5.0%+24.8%2.3 yr
TSHATaysha Gene Therapies, I$40M4.4%+221.6%3.3 yr
KYMRKymera Therapeutics, Inc$35M3.9%+204.3%1.3 yr
MIRMMirum Pharmaceuticals, I$31M3.5%+105.1%1.0 yr
BIOABioAge Labs, Inc.$31M3.4%+365.2%0.5 yr
CNTACentessa Pharmaceuticals$30M3.3%+176.2%3.3 yr
KALVKalVista Pharmaceuticals$29M3.2%+74.4%1.5 yr
XENEXenon Pharmaceuticals In$28M3.2%+73.3%0.3 yr
TERNTerns Pharmaceuticals, I$28M3.1%0.8 yr
OCULOcular Therapeutix, Inc.$27M3.0%+15.6%2.3 yr

Portfolio composition (YoY)

Industry mix
Biotechnology95.0%+1.5pp$858M
Unknown4.7%-0.8pp$42M
Medical - Devices0.4%-0.6pp$3M
Country
US80.0%+2.0pp
FR8.3%+6.7pp
Unknown4.7%-0.8pp
GB3.3%-3.9pp
CA3.2%
NL0.5%-4.7pp
Top 5: 48.4% · Top 10: 68.6% · Top 25: 98.5%

Winners

TickerPrev $PnLYoY %
DNTH$42M+0.15B362.6%
ABVX$8M+0.13B1681.6%
COGT$17M+0.09B542.6%
CNTA$20M+0.04B176.2%
TSHA$15M+0.03B221.6%

Losers

TickerPrev $PnLYoY %
GOSS$20M-0.01B-70.1%

Top buys this quarter · 11

DFTX Definium Therapeutics, Inc.new+$46M
MIRM Mirum Pharmaceuticals, Inc.+$29M
XENE Xenon Pharmaceuticals Inc.new+$28M
AKTS Aktis Oncology, Inc.new+$17M
CNTX Context Therapeutics Inc.new+$14M
ALMS Alumis Inc. Common Stock+$7M
OCUL Ocular Therapeutix, Inc.+$27M
KALV KalVista Pharmaceuticals, Inc.+$4M
BIOA BioAge Labs, Inc.+$3M
+$18M

Top sells this quarter · 15

DNTH Dianthus Therapeutics, Inc.$100M
TRVI Trevi Therapeutics, Inc.$16M
PHVS Pharvaris N.V.$14M
IRON Disc Medicine, Inc.$9M
KYMR Kymera Therapeutics, Inc.$9M
0SZI.L Corbus Pharmaceuticals Holdingexit$9M
ABVX Abivax S.A.$9M
EVMN Evommune, Inc.$8M
CATX Perspective Therapeutics, Inc.$6M
LXEO Lexeo Therapeutics, Inc. Commo$4M

Quarterly history (TTM returns)

PeriodAUM# PosReturn (1yr)SPY (1yr)Alpha (1yr)Flow
2026-03-31$904M29+165.76%+17.59%+148.17%-0.02B
2025-12-31$799M26+84.24%+17.72%+66.52%-0.08B
2025-09-30$640M25+25.16%+17.52%+7.64%-0.06B
2025-06-30$455M29-18.45%+14.94%-33.39%-0.06B
2025-03-31$477M35-41.39%+8.30%-49.69%+0.01B
2024-12-31$587M30-22.18%+24.89%-47.07%+0.04B
2024-09-30$592M39+11.27%+36.04%-24.77%+0.03B
2024-06-30$563M43-26.18%+24.49%-50.68%-0.05B
2024-03-31$792M55+6.53%+29.62%-23.09%+0.17B
2023-12-31$585M32+14.59%+26.18%-11.59%-0.13B
2023-09-30$536M34-24.66%+21.57%-46.23%+0.06B
2023-06-30$709M39+41.42%+19.42%+22.00%-0.07B
2023-03-31$693M35+6.64%-7.82%+14.46%-0.04B
2022-12-31$642M32-12.36%+7.56%-19.92%+0.13B
2022-09-30$579M35+25.44%-4.93%+30.37%+0.11B
2022-06-30$375M20-15.24%-16.11%+0.87%-0.02B